Improvement in shingle-machines



JOHN

B. DOUGHERTY, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN` SHINGLE-MACHINES.

Speciiicatiou forming part of Letters Patent No. 58.618, dated October 9, 1865.

To all whom it may concern:

Be it known that I, JOHN B. DOUGHERTY, of Rochester, in the county ot' Monroe and State ot' New York, have invented certain new and usefulImprovements in Shingle-Machines, and Ido hereby declare that the following is a full, clear, and exact description thereof, reference heilig' had to the accompanying drawings, making part of this specification, in which- Figure l is a top view of my invention. Fig. 2 is an elevation of the righthand end ot' the same, showing the guard R thrown up, as when the saw is to be removed. Fig. 3 is a vertical longitudinal section of the clampingframe B and the tilting rest T, taken in the direction of the red lines o in Fig. l. Fig. et is a detached perspective view ot' the tilting device. Fig. 5 is a vertical section of the saw S and ot' the collar j', and showing the manner of connecting' the same to the mandrel.

Similar letters indicate corresponding' parts in all the figures.

This invention consists mainly in providing; an automatic clampingdevice and tilting frame in this class of shingle machines, and also in an automatic feed-motion to the bolt or clamping frame, which causes it to feed forward to the saw at a moderate speed, and return it, after the shingle is sawed from the bolt, much more rapidly.

To enable others to make and use my invention, I will describe its construction and open ation.

I construct the frame A similar to that shown in my former patent of March 10, 1863, and the bolt-frame'B is sin'iilarly pivoted to it by the axial shaft O, which in this case is extended above the frame, and two diagonal braces, D, run from the top to said bolt-frame B, near the fixed clampingbar E. These brace-rods stiften the frame and prevent it from trembling or springing in the center. They may be connected to the top ot the shaft C by passing through the arms of the yoke or bar F, as seen in Fig. 1, and provided with set-nuts n, whereby they may be shortened up or lengthened, as may be desired.

The right-hand end of the frame is provided with a lug7 a., Fig. 3, at each corner, that bear against the under side ofthe circular track W, and the two traverse-rollers c travel upon the upper side of the track, and that being held to the frame by the pivot-screw I and clamping-screw j', this end ot' the frame is prevented from trembling while in action.

The clamping-bar E is made adjustable by means ofthe set-screws c in the slots z', Fig. 1.

The ends ot' the stock h, towhich the clamping-bar g is attached are supported in the slots j, Fig. 3. This stock has two toothed racks, which gear into the pinions 'lr upon the weighted or counterbalanced shat't I, to the end of which is attached au inclined plane or cam, m, Figs. 1 and 2. flien the frame recedes after cutting a shingle. the cam rides upoli the tappet or lug a, which causes the weight to to rise and turn the pinions lr, and thus withdraw the clamp, and the bolt drops onto the tilting frame, which is reversed from its previous position, and as the t'rame B returns to the saw the bolt is again clamped before it reaches the saw.

To adjust the clamps for longer or shorter bolts, the set-screws c are loosened, and the clamp E placed forward or back, and the setscrews p loosened in the arm ot' the counterbalance w, and in the cam m, the pinion-shatt Zturned so as to change the clamp g as desired, and the cam relatively, and the screws again tightened.

The frame B is oscillatcd by the crank Gr.

working in the slotted arm or lever H, which is keyed to the vertical axial shat't G ofthe frame B.

The worin or screw gear g is driven by a round band from the saw-mai'ulrel at r, Fig. 2. One end of the screwshat't g is supported in the hand-lever l, and is held in gear, when desired, by the spring-latch J. The erank-pin K moves in that portion otl the slot L nearest the axial shaft C ot' the frame B when the latter is moving back at'ter a shingle is sawed, which produces a faster movement than when it is t'eeding the bolt to the saw, because the pin is then traveling in theouter portion ofthe slot L.

The tilting frame or rest T in this machine is cast with a trunuion, r', on each rests upon the set-screws s, Fig. 3, by means ot which itmaybe set to saw thick orthin shingle. and under each corner of the frame is provided a set-screw, t, by means ot' Ywhich the proper bevel is given to the shingle either way while iu operation, or upon which the frame rests when the machine is set to saw barrel-heading side, that the saw, as seen at c in Figs. l and 5.

The star dial-plate M, having six points, is hung to the top of the frame A, and on the opposite end from M is provided another, N, having three points, or half the number of the other, whether it be given greater or less. The tilting frame T is provided withan ad- `instable lug, P, Figs. 1, 2, and 4t. It is made adjustable vertically, as seen in Fig. 4. The lower face of the lug is made with a slight V-shaped notch to receive the points of the star N. Thearm (),projecting from the clamping-frame, is provided with a latch, u, that swings loosely one way, but is prevented from turning in the opposite direction more than tol a perpendicular' by a lug or projection on the' head, striking against a shoulder or pin in the shaft, so that when the clamping-frame is feeding up to the saw the latch is drawn over the point of the star, as indicated in Fig. 2, but when itreturns, the star is turned one point from the position shown in Fig.2,which allows this end of the tilting frame to drop, so as to form the butt or thick end of the shingle at this end of the bolt. This end of the tilting frame, `being made considerably heavier than the other, will always rest upon the star N.

The natural tendency is for the saw to drive the end of the bolt laterally away from it, especially when the bolt is narrow. Therefore I provide several flat teeth, i', on the clampingbar h, that stand vertically, and they prevent any such recession or change in the position of the bolt.

The saw-guard is composed of two circular segments, It and U. They are hinged together at V, the axial pivot being horizontal. Section U is pivoted to the fralnc at'Y, and has a plate extending below the saw. It is thereby made to gather the sawdust and convey it, by the centrifugal momentum given it by the saw, to a considerable distance from the machine, and, of course, prevents it from ying all over it and the operator, as heretofore.

Section R is locked to section W, as shown at y, Fig. 1, which permits that end to be raised .np when the saw 1s to be removed, as seen in Fig. 2, and at the same time allows the spoutsection U to be swung back, as indicated by the dotted lines U', and section W, being released by turning the clamping-screw f, may also be swung back, as shown by the dotted lines W. The 'clamping or bolt frame B is then drawn hack, which leaves the saw entirely uncovered, when it may be removed by simply taking off the one nut O.

I provide the saw on the under side with a sort of stock or collar, j', the outer edge of riveted to The which is made very thin, and it is collar is made with a conical hole, and feathlso as not to come in ered to receive the end of the mandrel or arbor, to which it is fitted, and it is rigidly riveted to the saw.

By this construction and arrangement of the parts, it is unnecessary to use the stock-collar on the top of the mandrel, as heretofore made, and to which the saw was then secured by three or more bolts. Therefore, with a givensized saw, much larger bolts may be cut.

The latch u may be turned up or swung over, contact with the points of the star. By this provision the machine may be converted into a barrel-head cutter.

This adjustment of the latch is also frequently required to enable the operator to true up the face of the bolt preparatory to cutting a perfect shingle.

By simply removing the set-screw that attaches the arm H. to the shaft G, the machine is converted into a handsmachine.

The rests b of the tilting frame are made in arcs of circles, the centers of which are at the center of shaft U. This prevents the friction heretofore produced by the bolts dragging on across them instead of sliding upon them longitudinally. It is much cheaper and quite as convenient to provide the frame A with the lugs a', instead of bolting on straps for this purpose, as heretofore practiced.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The construction and relative arrangement of the saw-guard R and U in the manner shown and described, to facilitate the removal or readjustment of the saw in the machine, and for conducting the sawdust from the machine, substantially as set forth.

2. The arrangement of the countenbalance er, shaft l, pinions lo, racks x, and clampingbar g, in combination with the cams m and n, substantially in the manner and for the purposes setforth.

3. The arrangement of the screw-gears and crank G withthe slotted arm H, attached to the axial shaft C of the bolt or clamping frame B, substantially as and for the purposes shown and described.

4. Providing the saw S in the within-described machine with a collar, j. having a conical bore to t the mandrel, as and for the purposes set forth.

5. The arrangement of the pi'voted or swinging circular track W, as and for the purposes set forth.

JOHN B. DOUGHERTY. 

